You can only have 1-9 before deug. It's like English -teen: fourteen, fifteen, but not hundredteen or thousandteen. And for 20, 100 and 1000, you simply say fichead, ceud, mìle and not aon fhichead, aon cheud, aon mhìle. BTW: aon lenites, you just don't see it with aon deug, because d doesn't lenite after n.

You can only have 1-9 before deug. It's like English -teen: fourteen, fifteen, but not hundredteen or thousandteen. And for 20, 100 and 1000, you simply say fichead, ceud, mìle and not aon fhichead, aon cheud, aon mhìle. BTW: aon lenites, you just don't see it with aon deug, because d doesn't lenite after n.

OK, here is where I got those:

According to Everyday Gaelic, you can say "naoi ceud deug" for 1900 and so forth.

On Akerbeltz.org (scroll down to the bottom segment) he gives this as an example: 16,745 = sia mìle deug, seachd ceud, ceathrad is a cóig